Spring needle presser



Am. w, 1923 Y www? G. P. BOSWORTH' SPRING NEEDIJE PRESSER F11-ed May 26,1919 2 sheets-sheet 1 @9427, @yay-QZ Patented Apr. lill, '1923.

PATENT GEORGE P. BOSWORTH, 0F CENTRAL FALLS, RHODE ISLAND, ASSGNR T0HEJEHLL COMPANY, OF CENTRAL FALLS, 'RHODE ISLAND, A. CORPORTON '0F'MASSACHU- SETTS.

SPRING NEEDLE EPRESSER.

Application filed May 26, 1919. Serial No. 299,972.

To all whom t may concern Be it known thatJ l, GEORGE F. BosWoR'rH, acitizen of the United States, and a resident of Central Falls, in thecounty of Providence and State of Rhode lsland, have invented anImprovement in Spring Needle Pressers, of which the followingdescription, in connection with the accompanying drawings, is aspecilication, like characters on the drawings representing like parts.

This invention relates to spring needle pressers, and it is the objectthereof to provide individual needle pressers capable of being producedin large numbers, accurately and with a substantial uniformity in thearticles so produced.

The invention consists of certain features pertaining to the presserwhereby the above objects may be attained, as set forth in the followingspecication and particularly pointed out inthe claims.

Referring to the drawings wherein l have, merely for illustrativepurposes, disclosed a presser embodying the features of my invention,together with instrumentalities for effecting 'the grinding thereof,

Fig. l is an enlarged end elevation of means for holding a group ofpressers during the grinding operations; o Fig. 2 is a section taken onthe line 2 2 of Fig. l and illustrates one method of applying thegrinding instrument to the surfaces to be.ground;

Fig. 3 is a side elevation greatly enlarged of one of the pressersembodying this invention, a spring beard needle being shown inconnection therewith, the beard whereof is impressed, as shown in fulllines, and pressed into the eye of the needle, as shown in dotted lines,so as to illustratethe manner in which a needle and its pressercooperate to form a loop;

Fig. l is an end view of the presser and of a knitting needle shown intheir cooperative relation;

\Fig. 5 is a detail view illustrating another form oi grinder that maybe used in grindi ing the needle-beard engaging surfaces .oi

said pressers;

Fig. 6 is a plan viewT of a section of a presser holding cage with anumber of pressers mounted therein in knitting relation;

Fig. 7 is a plan view of a portion of a circular series of pressersarranged in grinding relation; and

Fig. 8 is a greatly enlarged plan view of a presser embodying theinvention.

Although the present invention is applicable to various types ofindividual pressers, l have elected, merely ior convenience, to show thesame in connection with the presser disclosed in my Patent No.1,209,256, dated Dee. i9, 191e.

This type of presser, as most clearly shown in Figs. 3 and 4,1embodiesahead portion l of slightly greater thickness than the knitting needle 2with which it is to cooperate. This head l has a beard-engaging surface3 adapted at certain times in the knitting operations, and by means of asuitable presser cam not shown, to be moved into a position to engagethe beard i of the needle during the loop-forming movement. thereof inorder to press said beard into the needle eye 5.

rlhe upper portion of the head l of said presser is inclined or beveledat e suihciently to prevent the end of the beard l from abutting againstthe upper end or" said presser during said loop-forming movement and toeffect the deflection of the beard thereof into its eye at a time whensaid presser has been moved by said presser cam into its beard-engagingposition, as shown most clearly in Fig. 3.

The type oi presser shown herein has a relatively thin depending stemportion 7 adapted to lfit into a corresponding slot formed in the outerface of a retaining or assembling'ring 8 shown most clearly in Fig.

,-6, into which ring the desired number of pressers are placed atsuitable distances apart and wherein they are held by appropriate meansnot shown.

As shown in Fig. 3, the lower end of the stem 7 of each presser is madetapering, it being beveled both at the front and back edges thereof, thefront bevel being especially provided for the purpose oi' allowing aslight rocking movement oi the presser to be effected in the ring 8 bythe presser cams during the movement thereof trom their inactive totheir pressing positions. rl`he back beveled surface which extends fromthe lower end of the stem 7 to the notch ll is merely for the purpose offacilitating the assembling of the pressers in the retaining ring 8.

rThis invention is principally concerne". with the 'form of the beardengaging faces liv 3 and 6 of the pressers which are herein shownconcavely ground with the grinding lines extending transversely of saidfaces.

Obviously the curvature of the concave face 3, shown most clearly inFig. 8, may be varied according to the degree of curvature desired butwhatever this radius may be it preferably will always describe a segmentof a true circle and its center will coincide with the center of thecircle described by the beard-engaging facesof the pressers whenarranged for grinding. ln other words these segments of a circlecollectively describe a4 continuous or true circle, the radiuswhereof`coincides with. the radius of said segment .when the pressersare grouped for grinding. 'lhis Will be more clearly understood byreferring to Fig. 7 wherein the radius of the inner face 3 is indicatedat A and corresponds with the radius A of the 'enlarged Fig. 8.

By forming the pressers with transversely ground concave beard-engagingfaces a number of advantages will result which advantages include theuse of a very simple form of holder such, for example, as l haveillustrated in' Figs. `1 and 2'. This holder comprises a member 12having an arbor 13 for insertion in a lathe chuck or the like.

Formed in a cylindrical part 14 of the member 12 are closely spacedperipheral grooves 15 adapted to receive the stems7of the pressers whichrest with their shoulders 7 against the ends 16 of said cylindrical part15 wherein they are yieldingly held during assembling, by a spring band17 resting in a groove 14 in said part 14. rfhe slots 15 are arrangedclose enough together to in sure the touching. of the edges of thethickened heads of the pressers wherein the grooves 3 and 6 are formedwhereby a substantially continuous circle will be formed, the radiuswhereof substantially coincides with the radius A of Fig. 7.

A collar 18 is adapted to ht over the part 14 encircling the pressersarranged in said grooves 'and is firmly held by screw threads 19 and 20with a shoulder 21 thereof seating'agafinst shoulders 22 on thepressers, said collar bearing at 23 against the straight outer edges 24of said presser. An internal face 25 of said shoulder 21 also engagesedges 26 of said pressers serving to pro vide suitable backing for saidpressers during the grinding operations.

or at 29 Fig. 5 which operates transversely of said edges duringrelative or concurrent movements of said pressers and grinder inopposite directions to produce concavities that are precisely alike'or-uniform in all of the pressers.

A comparison of Figs. 6 and 7 will disclose the fact that the radius Bof the circle described by the faces' 3 of the circular series ofpressers, When arranged in the ring 8 for knitting is much larger thanthe radius A of the circle of said pressers when the latter are arrangedin the holder grooves 15 for grinding.

Claims:

1 'As an article of manufacture, a needle beard presser having aground,beard-depressing surface, the grinding lines whereof extend transverselyto the direction of movement of the needle beard during the depressingoperations.

2. As an article of manufacture, an indi.- vidual needle beard presserhaving a transversel ground, beard-engaging surface.

3. s an article of manufacture, an individual needle beard presserhav-ing a transyersely ground, concave, beard-engaging surace.

4. As an article of-manufacture, an indi! vidual needle beard presserhaving a'concavely ground, beard-deflecting surface the concaved face ofsaid presser describing a segment of a true circle formed intransversely grinding said surface.

5. As an article of manufacture, a needle beard presser having atransversely ground, concave, beard-deflecting surface extendinglongitudinally of the head portion of said presser.

6. As an article of manufactura-an individual needle beard presserhaving a beardengaging head, andl a relatively thin stem, said headhaving relatively inclined, ground, concave, beard-engaging edges, thegrinding lines whereof extend transversely of said head.

7. As an article of manufacture, an individual needle beard presseradapted for arrangement in a circular series for knitting, said presserhaving a transversely ground concaved beard engaging surface, the radiuswhereof is shorter than the radius of the circle described by saidcircular series of pressers.

8. A circular series of spaced, individual needle beard pressers eachhaving a. ground concaved beard engaging` face describing a segment of acircle, the radius whereof coincides with the radius of the circledescribed by said circular series when the latter are arranged with theedges oftheir beard engaging faces in substantial contact, said grindingbeing transverse.

9. A circular series of spaced, individual, needle beard pressers eachhaving a transversely ground, concaved, beard-engaging face, theconcavities of the entire series of pressers being identical and thelongitudinal edges of said pressers being devoid of roughness, theradius of the concavity of each presser bein shorter than the radius ofthe circle 'descrl ed by said circular series when said pressers arespaced for knitting.

10. A circular series of spaced, individual, needle beard pressers7eachhaving a transversely ground, concaved, beard-engaging face, theconcavities of the entire set of pressers being identical, and theradius of. said concavities co-extending with the radius of the circledescribed by said circular series of pressers when the latter arearranged with the edges of their beard-,engaging faces in substantialcontact When said pressers are grouped for finishing.

` ll. As an article of manufacture, an indi- 2@ vidual, needle beardpresser having a transversely ground, beard-deecting surface extendinglongitudinally of the head portion of said presser, said concavitycomprehending the entire surface of said head portion and thelongitudinal edges defining said concavity being Wholly devoid ofroughness owing to said transversely ground concavity.

l2. A circular series of individual needle beard p-ressers each having athickened concave beard-engaging face with grinding marks extendingtransversely of Said imc., the concave faces of said pressers beingconstructed, When in grinding relation, collectively to describe acontinuous circle with a radius coinciding with the radius of theconcave face of each of said pressers.

In testimony whereof, l have signed my name to this specication.

enoaee r. nosvvoa'rn.

